Device for automatically cutting off the supply of gas to a burner.



O. GORDON.

DEVICE FOR AUTOMATICALLY CUTTING OFF THE SUPPLY OF GAS TO A BURNER.APPLICATION I'ILEJI) MAR. 7, 1918.

1,079, 122, Patented Nov. 18, 1913.

ed. to depend a slight distance below the burner 16, it being understoodthat the lever 34 can be either actuated by pushing down on the rod 20or by pulling on the cord 36. A pilot tube 37 has connection with thevalve chamber 11 and extends downwardly and terminates adjacent theburner 16, a valve 38 being carried by the pilot tube 37 for controllingthe supply of gas thereto.

When the valve 28 is reposing on the valve seat 29 and thus preventingthe gas in the supply pipe 14 from passing into the pipe 15 and thenceto the burner, the stem 27 will be in lowermost position and will beheld in this position by the expansible action of the spring 30. When itis desired to produce a flame at the burner 16, a downward pull isexerted on the cord 36, it being understood, however, that a downwardpush on the rod 20 will accomplish the same result, and in consequencethereof the lever 34 will be actuated so that an end of the lever willengage the pin 35 and impart an upward movement to. the stem 27, thusunseating the valve 28 and permitting the gas-to pass through the easing10, into the pipe 15 and then to the burner 16 where the gas will beignited by the pilot flame at the lower end of the pilot tube 37 andwhich receives its supply of gas from the valve chamber 11. When theiiameat the burner 16 has heated the expansion tube 25 sufficiently tocause the same to expand longitudinally and abut against the lower endof the stem 27, the

downward pull on the cord 30 is released and it will thus be seen thatthe expansion of the rod 25, and by ieans of which the tube engages thestem 27, retains the valve 28 in open position so that a constant supplyof gas will pass from the supply pipe 14: to the burner 16. Now if forany reason the pressure in the gas main should be reduced, the [lame atthe burner 16 will of course be diminished and as a result thereof, ifthe pressure is entirely out off, the expansion rod 25 will cool andcontract, the spring 30 will move the stem 27 downwardly and move thevalve 28 into closed position to cut off the supply of gas to theburner.

From the foregoing description it will. therefore, be apparent that theescape of gas into a room, will be prevented in view .of the fact thatwhenever all pressure is reduced or cutoff so as to result in the 'eX-tinguishing of the flame at the burner, the valve 28 will'be moved intoclosed position and cut on the supply of" gas, to the burner, it beingfurther seen, however, that by simply exerting a pull on the cord 36,the gas will again be conveyed to the burner to produce a flame at thatpoint and as long the pressure is not reduced in the gas main the flameat the burner will continue.

Having thus described my invention, 1 claim 1. In a device of the classdescribed, the combination with a casing provided with an inlet and anoutlet, of a gas supply having connection with the inlet of the casing,a pipe having connection with the outlet, a burner carried by the pipe,a stern mounted to slide in the said casing, a valve carried by the stemto normally close a passage be tween the inlet and the outlet, a bracketsupported on the casing, a lever mounted to swing on the bracket, a pinprojecting from the stem and adapted to be engaged by the said lever toactuate the stem and unseat the said valve in the said casing, and anexpansion rod adjustably supported on the said bracket andprojectingvertically adjacent the said burner to engage the said stem when thesaid rod is extended. 85

2. In a device of the class described, the combination with a casingprovided with a valve chamber and having an inlet and an outlet, withthe said casing attached to a gas supply terminating in the said inlet,of a pipe connected to the casing at the outlet thereof and dependingbelow the casing, a burner carried by the pipe, a bracket-supported onthe casing, a stem slidable in the said casing and depending exteriorlythereof, a valve carried by the stem and normally closing a passagebetween the inlet and outlet in the said casing, an expansion rodadjustably supported on the said bracket adjacent the said burner, withthe upper end 100 of the expansion rod engaged by the lower end of thesaid stem, a lever mounted to swing on the said bracket, a pinprojecting from the stem and adapted to be engage by the lever when thesame is actuated to 105 move the said stem to unseat the said valve, andmeans for operating the said lever.

3. ln a device of the class described, the combination with a casingprovided with a valve chamber and having an inlet and an outlet, withthe said casing attached to a gas supply terminating in the said inlet,of a pipe connected to the casing at the outlet thereof and dependingbelow the casing, a burner carried by the pipe, a bracket supported onthe casing, a stem slidable in the said casing and depending exteriorlythereof, a valve carried by the stem and normally closing a passagebetween the inlet and outlet in the said casing, an expansion rodadjustably supported on the said bracket, adjacent the said burner, withthe upper end of the expansion rod engaged by the lower end of the saidsten1,alevermountcd to swing on the said bracket, a pin projecting fromthe stem and adapted to be engaged by t e lever when the same isactuated to move the said stem to unseat the said valve, means foroperating the said lover, a spring carried in the casing and 1.30

